Dispenser for supplying pieces of paper

ABSTRACT

The dispenser supplies pieces of paper, pulled out from a reel of paper (2) contained therein, without any contact between a user and not pulled out paper. If the paper reel has transversal pre-cut lines, the length of each piece is equal to one or more distances between the two following pre-cut lines. If the paper reel has not transversal pre-cut lines, the length of each piece is determined by the user.

TECHNICAL FIELD

The present invention relates to small electrical household appliances,capable of facilitating some operations usually performed manually or bymanually operated devices.

BACKGROUND ART

The use of electrical household appliances sometimes has positiveeffects in particular fields, such as hygiene, very important speciallyin public areas, places of work, communities and the like, particularlywhen food and hygienic services are concerned.

In such places there are usually used reels of paper, from which onetakes pieces of paper of different length, according to the needs.

At present, these reels of paper are inserted in very simple devices;the user manually unwinds and tears a piece of paper he needs, using thepre-cut lines made in the reel of paper, or suitable blade with whichthe device is equipped.

The most common types of the above mentioned devices cannot avoid thecontact between the user and the paper remaining on the reel, i.e. thepaper that will be used by the next user.

This unacceptable situation causes the users' precautionary behaviour,what means that they take first a piece of paper to throw away andanother piece of paper to be used.

This results in great waste of material and consequently, in highoperating costs, due to frequent interventions of supplying staff.

DISCLOSURE OF THE INVENTION

The object of the present invention is to propose a dispenser of piecesof paper, constructed in such a way as to supply pieces of paper, pulledout from the reel of paper contained therein, of desired length or oflength equal to one or more predetermined value, i.e. distance betweentwo following transversal pre-cut lines made in the same reel of paper,the whole without any contact between the user and the not taken paper.

The object as defined before, is achieved by means of a device forsupplying pieces of paper from a paper strip with or without transversalpre-cut lines, including a box-shaped housing with a recess forreceiving a reel of paper, a first pulling-out mechanism with upper andlower rollers connected to each other by belts which run into groovesmade in the rollers, the grooves of the upper roller having innermostdiameter bigger than the diameter of the lower rollers' grooves, asecond pulling mechanism including a second pair of upper and lowerrollers also connected to each other by belts which run into grooves,with the grooves of the upper roller having a diameter bigger than thediameter of the grooves of the lower roller and with a run of each oneof these last mentioned belts facing a corresponding run of a previouslymentioned belt of the first pulling-out mechanism, a cover hinged to thehousing for insertion of a reel into the recess and adapted to assumeone or the other of several positions, and power driving means activatedby control means and provided for operating said pulling-out mechanisms.

According to a first embodiment, the cover can take two positions whichcorrespond to a first situation in which the upper rollers are almost incontact which each other, whereas the lower rollers are separated fromeach other to define a condition in which a piece of paper is unrolledfrom the reel and made pass through said upper rollers, said facing runsof the belts, and said lower rollers, then going out of the dispenser,and to a second situation in which said upper and lower rollers arealmost in contact with each other to define a condition in which thepiece of paper is separated from the strip along one of said pre-cutlines located between the upper lower rollers as a consequence ofpulling action due to higher speed of the lower rollers with respect tothe upper rollers.

In a second embodiment there is provided a switch, subjected to elasticmeans placed between facing runs of the belts and set in engagementtherewith, while the cover takes one or the other of two positions,namely an inoperative closing position (R) and an operative closingposition (O), and a stationary blade is located in a positionintermediate between the upper and lower rollers.

The belts also operate a switch connected to the power driving means sothat first, the upper rollers are kept almost in contact with eachother, whereas the lower rollers are separated from each other and apiece of paper is unrolled from the reel, and then the upper and lowerrollers are kept almost in contact with each other and the pullingaction provoked by higher speed of the lower rollers tightens the pieceof paper and changes the arrangement of the facing runs connected to theswitch, so that the piece of paper is cut by the stationary blade.

In a third embodiment, there is provided a pinion keyed to an head ofthe upper roller of the first pulling-out mechanism for mesh engagementwith a toothed sector of a disc supported by the housing, and twoauxiliary rollers supported by the upper roller of the secondpulling-out mechanism, which are pressed onto sloping surfaces integralwith the housing by the elastic reaction of the belts.

An annular cam groove is made in the disc and includes an in/out region,a first portion with constant radius, and a second portion with varyingradius, along which a pin of the cover runs.

A blade is formed by adjacent sectors and supported by the housingbetween the upper and lower rollers while a paper pressing member issupported by the cover in a position in which it faces the blade.

In this case, first the cover takes a position, in which the paperunrolls from said reel, then the cover takes a further position, inwhich the paper unrolling stops and the paper located between saidpulling-out mechanisms is pushed by the paper pressing element againstthe blade thus making a series of cuts in the paper, and lastly thecover takes another position, in which the upper and lower rollers toucheach other and are operated to tear a piece of paper from the stripalong the cuts.

BRIEF DESCRIPTION OF THE DRAWINGS

The characteristic features of the present invention, in accordance withclaims, are pointed out in the following description with particularreference to the enclosed drawings, in which:

FIGS. 1a, 1b, 1c show as examples, some dispensers designed to containdifferent reels of paper of the most common types;

FIG. 2 shows a lateral sectional view of the dispenser opened in orderto introduce the paper reel;

FIG. 3 shows the dispenser when it is closed and in inoperativeconditions;

FIGS. 4, 5, 5a show subsequent working steps for withdrawing a piece ofpaper with pre-cut lines made therein;

FIG. 6 shows a front, partially sectioned view of the dispenser takenalong the plane VI--VI of FIG. 2;

FIGS. 7, 8, 9 show subsequent operation steps of a first embodiment forusing paper reels without pre-cut lines;

FIGS. 10, 11, 12, 13 show subsequent operation steps of a secondembodiment for using paper reels without pre-cut lines;

FIG. 14 shows an enlarged cross-sectional view taken along line XIV--XIVof FIG. 10;

FIG. 15 shows a fragmentary view taken along plane XV--XV of FIG. 14.

BEST MODES OF CARRYING OUT THE INVENTION

With reference to the above mentioned figures, the dispenser of paperpieces, being the subject of the present invention, is indicated withreference numeral 1.

FIGS. 1a, 1b, 1c show the examples of different possible shapes of thedispenser 1, for toilet paper for domestic use, (FIG. 1a), formultipurpose paper reels (FIG. 1b) and toilet paper reels of greatdiameter for public places (FIG. 1c).

Figures from 2 to 6 show the dispenser 1, designed for delivering piecesof paper from reels 2 with transversal pre-cut lines (not shown),including a box-shaped housing 3, to be fixed to the wall, with a recess4 for receiving a reel 2 of paper.

A cover 5 is hinged to the box-shaped housing 3 for allowing, whenopened, insertion of a reel 2 into the recess 4 (FIG. 2).

A first pulling-out mechanism 6, supported by said box-shaped housing 3,includes a first pair of horizontal rollers 61, 62, upper and lowerrespectively, connected to each other by a plurality of belts 63 whichrun into respective first and second grooves 61a, 62a made in said upperand lower rollers 61, 62.

The box-shaped housing 3 supports also power driving means 7, whichinclude e.g. an electric motor, connected to link member 8 that isjoined, at the outlet, to the upper roller 61.

The innermost diameter of the grooves 61a, made in the upper roller 61,is bigger with respect to the diameter of the corresponding grooves 62aof the lower roller 62: it results in the bigger speed of the lowerroller 62, driven to rotate by the belts 63, with respect to the upperroller.

A second pulling-out mechanism 9, similar to the first one, supported bythe cover 5, includes a pair of horizontal rollers 91, 92, upper andlower respectively, connected to each other by a plurality of belts 93which run into respective first and second grooves 91a, 92a, made in thesame rollers 91, 92.

Likewise the first mechanism 6, also the innermost diameters of thegrooves 91a, 92a are different so that the speed of the lower roller isbigger than the speed of the upper roller, when they are driven torotate.

It is to be pointed out that the illustrated embodiment makes thepulling-out mechanisms 6, 9 keep the cover 5 close with respect to thehousing 3: more precisely, the upper rollers 61, 91 and lower rollers62, 92 and the fulcrum F between the cover 5 and the housing 3 arepositioned one with respect to another in such a manner that, during theclosing action, the upper roller 91 and the lower roller 92 of thesecond pulling-out mechanism 9 slip over the upper roller 61 and thelower roller 62 of the first pulling-out mechanism 6, respectively, and,after having passed an unstable situation, they assume, with pressurethereon, a stable position, where the cover is locked.

The rollers 91, 92 can be released from this last locking position onlyby counterclockwise pressure (FIG. 3). Push button means 70, supportedby the box-shaped housing 3, include e.g. a micro switch that activatesthe power driving means 7.

A rocker lever 51, supported by the cover 5, situated in the region ofthe push button means 70 to act thereon as described in the following.The dispenser inoperative position, shown in FIG. 3, in which the upperrollers 61, 91 and the lower rollers 62, 92 touch each other (i.e. coverclosing and inoperative position R), is followed by a first operativeposition (FIG. 4), due to a pressure exerted manually on the cover 5 inthe direction indicated with the arrow A (closing and operative positionO of the said cover).

This causes the micro switch 70 being operated by the lever 51, andconsequently, activation of the power driving means 7 of the firstpulling-out mechanism 6 connected thereto, and of the second pulling-outmechanism 9 driven by friction of the first pulling-out mechanism 6.

Moreover, the rotation of the cover 5 make the lower rollers 62, 92 ofthe pulling-out mechanisms 6, 9 separate one from the other, while theupper rollers 61, 91 are still almost in contact.

In this condition, the paper is unwound from the reel 2 by the upperrollers 61, 91 and, guided by the belts 63, 93 goes out of the lowerpart of the dispenser 1, downstream of the pulling-out mechanisms 6, 9and next to the rocker lever 51, in the direction indicated by the arrowB (FIG. 4).

When a piece of paper of desired length has been delivered, the pressureon the cover 5 is removed and the cover returns to the initialinoperative position R. Consequently, the power driving means 7 stop, asa result of deactivation of the micro switch 70.

In the second operative step, the piece of paper going out of thedispenser 1 is held with the hand and slightly pulled in diagonaldirection, as indicated by the arrow C (FIG. 5a), so as to make thelever 51 swing toward the micro switch 70 and activate it, thus drivingthe pulling-out mechanisms 6, 9 again to rotate.

In this condition, the paper is held simultaneously between the upperrollers 61, 91 and between the lower rollers 62, 92. Because of thehigher speed of the lower rollers 62, 92, the piece of paper comprisedbetween the same rollers is pulled, and is separated from the remainingpaper, along the pre-cut line made therein.

When the piece of paper has left the dispenser 1, the pressure on thelever 51 is decreased and the micro switch released, so that the powerdriving means 7 are deactivated and, in this way, the pulling-outmechanisms 6, 9 stop.

FIGS. 7, 8, 9 show working steps, correspondent to the FIGS. 3, 4, 5a,of another constructive variant of the pulling-out groups 6, 9, arrangedto use reels of paper without pre-cut lines.

For the simplicity's sake, FIGS. 7, 8, 9 do not show in detail theelements surrounding the pulling-out mechanisms, since they are notsubstantially or functionally changed with respect to what has beenpreviously illustrated and described.

In the above mentioned modified form, a stationary blade 30 is securedto the box-shaped housing 3 in an intermediate position between theupper rollers 61, 91 and the lower rollers 62, 92.

The fulcrum of a fork operated switch 31, subjected to elastic means 32,is situated on the same rotation axis of the roller 61.

Rollers 33, supported rotatably by the ends of the prongs of the fork31, touch the facing runs of the belts 63 of the first pulling-outmechanism 6. The second pulling-out mechanism 9 features a belttightener 40; in the shown example, the tightener includes a pair ofrollers 41, engaged with the belts 93, and carried rotatably by the endsof bars 42, which are inserted telescopically, on the opposite parts,into a sleeve 43, against the reaction of elastic means 44, locatedinside the sleeve 43.

The belt tightener 40 is designed to maintain the correct tension of thebelts 93 during the working steps described below.

Advantageously, suitable elastic belts 93 can be used instead of thebelt tightener 40. In the inoperative position of the dispenser 1, withthe cover 5 closed, the rollers 61, 91 and 62, 92 of the mechanisms 6, 9are almost in contact, while the switch 31, due to the action of theelastic means 32, keeps the belts 63, 93, along the section, in whichthey are mutually opposite pressing each other and oriented in such amanner that the defined path of the paper between the belts 63, 93 doesnot interfere with the fixed blade 30 (FIG. 7).

The above mentioned situation is maintained also during the paperunwinding step (FIG. 8), with lower rollers 62, 92 separated, completelyidentical with the correspondent step of FIG. 4.

When the piece of paper of desired length has been delivered, thepressure on the cover has been removed and the power driving means 7stopped, the second step follows, in which the piece of paper is heldwith a hand in order to reactivate the power driving means 7 by therocker lever 51.

The portion of paper comprised between the rollers 62, 92 is pulled dueto the higher speed of the same lower rollers 62, 92, as has beenalready described.

The above mentioned pulling action determines the movement of the forkoperated switch 31 against the elastic means 32 (FIG. 9); consequently,the paper follows such a path, defined by the belts, that it is struckby the stationary blade 30 and cut off.

When the piece of paper has left the dispenser, the power driving means7 stop in the same way as has been previously described.

In FIG. 10 and the following ones, there is shown a further embodimentthat is in particular designed for reels of paper without pre-cut linesand rather thick, e.g. the type used as hand dryer.

In this instance, reaction force of the paper firstly due to the cutaction and then to tear action, get rather high value that could provokefailure in operation of the device, when the previously describedembodiment is adopted.

In the same way as in previously described embodiment, when a firstpulling-out mechanism 6 and a second pulling-out mechanism 9 areoperated, the lower rollers 62, 92 rotate faster than the upper rollers61, 91.

A pinion 64 is keyed to a head of the upper roller 61 and is in meshingengagement with a toothed sector 81 that is made along the outline of adisc 80 rotatably supported by the housing 3 and connected to the powermeans 7 by link means which are not shown.

One of the disc sides, the one that faces the cover 5, features a camgroove 82 in which a pin 50, rotatably fixed to the cover 5, runs. Thepath of the cam groove 82 extends in direction W, according to which thedisc rotates, so as to define two adjacent portions 82a, 82b whichcorrespond to unrolling of the paper 2 from the reel and subsequentcutting thereof as described in the following.

At the end of the portion 82b, i.e. at the beginning of the portion 82a,there is made an in/out region 82c, open in the outer side of the disc80 for disengagement of the pin 50 when the cover is opened.

The upper roller 91 supports at both ends two auxiliary idling rollers95 which are in abutment on sloping surfaces 96a due to the elasticaction of the belts 93. The sloping surfaces 96a are formed onextensions 96 made integral with the housing 3.

A blade 30, formed by adjacent sectors, is secured to the housing 3, ina position intermediate between the upper and lower rollers of thepulling-out mechanisms 6, 9 with a paper pressing member 35, secured tothe cover and facing the blade.

In FIG. 10, there is shown the closing and inoperative position R of thecover 5 in accordance with the modified form of the subject dispenser.

Unlike the previously described constructive forms, this position is setby known means, which are not shown, which allow the cover 5 to take theoperative positions as described in the following.

In the same FIG. 10, it is possible to see the upper rollers 61,91, andrespectively the lower rollers 62,92, which touch each other while thedisc 80 is in the idle position, in which the beginning of the toothedsector 81 is in mesh with the pinion 64, and while the in/out region 82cis in the area of the pin 50.

When a pressure is applied by hand to the cover 5, in directionindicated by arrow A (operating position O of the cover), the pin isshifted to be in alignment with the inlet of the cam groove 82 and themicro switch 70 (not shown in this Figure) is operated by the lever 51.

This causes activation of the power driving means, which rotate thetoothed sector 81 in direction W, that, due to its meshing with thepinion 64, drives the pulling-out mechanisms 6,9 for pulling a piece ofpaper from the paper reel 2.

While this action is being performed, the pin 50 runs the first portion82a of the cam groove 82 that extends along a constant radius arcconcentric with the disc 80.

It is to be noted that during unrolling of the paper, the lower rollers62,92 always touch each other, while the auxiliary rollers 95 run alongthe respective sloping surfaces 96a and move the upper roller 91,connected to them, apart from the other upper roller 61.

This allows to constantly pull the paper that passes through thepulling-out mechanisms 6,9 because of the higher rotation speed of thelower rollers with respect of the upper rollers. The paper can slipbetween the belts 63,93 in the region of the upper rollers, which are,as already mentioned, kept apart from each other.

Duration of this unrolling action, and consequently the length of thepiece of paper being delivered, depends on the length of the toothedsector 81.

Then, due to rotation of the disc 80, the toothed sector 81 disengagesfrom the pinion 64, and both the pulling-out mechanisms 6,9 stop so thatthe paper is no longer unrolled.

Meanwhile, the pin has reached the end of the first portion 82a of thecam groove 82. Continuation of rotation of the disc 80 brings the pin 50to run the second portion 82b of the cam groove 82, which includes asection with progressively decreasing radius, as illustrated in FIG. 12.

Because of this radius decrease, the cover 5 is imparted a furtherrotation in direction A that brings it to the cutting position T,wherein the paper pressing member 35 pushes the paper against the blade30 in the region between the pulling-out mechanisms 6,9 (see FIG. 12).

The belts 63,93 are also pushed by the member 35 and get curved whilebeing inserted into the spaces left among the sectors of the blade 30,so that they do not touch it (see FIG. 14).

In this way, the paper 2 is partially cut and appears like in FIG. 15,i.e. broken by a series of cuts 2a which correspond to the sectors ofthe blade 30. The disc 80 continues its rotation and brings the pin 50towards the outlet of the second portion 82b of the cam groove 82running a second section with a progressively increasing radius, whichcauses the cover 5 go back to its closing and inoperative position R,like the one shown in FIG. 10.

As a consequence, the power driving means 7 and the disc 80 stop, andthe upper rollers 61,91 get in touch with each other again.

The piece of paper goes out of the dispenser 1 and is gripped by theuser's hand that, like for the previously described embodiments, pullsit diagonally (in direction indicated by the arrow C in FIG. 13) so thatthe lever 51 swings pushing the micro switch 70. The power driving means7 are operated again and the disc 80 rotates. The toothed sector gets inmesh with the pinion 64 setting the pulling-out mechanisms 6,9 inoperation.

Since both the upper rollers 61,91 and the lower rollers 62,92respectively touch each other, the paper is so stretched that it tearsalong the weakened section of the cuts 2a previously made by the blade30. When the piece of paper is completely out of the dispenser themechanisms 6,9 are stopped according to the modes already describedhereinbefore.

The disc 80, that has made a complete turn, is again in its startposition, as shown in FIG. 10.

In another embodiment, not shown in the figures, the dispenser 1, in allmodified forms, that is for reels with pre-cut lines and for reelswithout such lines, is equipped with a timer instead of the rockinglever 51, that is made stationary.

The above mentioned timer is reset at the time when the pressure on thecover 5 is removed, i.e. after the piece of paper of desired length hasbeen unrolled from the reel 2.

The timer activates the power driving means 7 for a predetermined time,long enough for carrying out the second working step, in which the pieceof paper is separated and delivered.

The above description makes evident the advantages of the subjectdispenser, that allows to withdraw a desired quantity of paper in aneasy and hygienically protected way, since the edge of the paper remainsinside the dispenser between one paper withdrawal operation and another.

Moreover, it is to be pointed out that the constructive characteristicsof the proposed solutions allow to obtain a dispenser which is compact,versatile, and made of few simple, reliable and cheap components.

The low costs takes a basic importance when the market accepts orrejects certain products mainly because of costs. For this reason, someconstructive solutions used in the subject dispenser, such as the coverclosing and opening systems, obtained with a particular conformation ofthe pulling-out group, or combining various cover functions, such astotal covering, outer finishing, push button control and movement of thepulling-out mechanisms, are particularly interesting.

I claim:
 1. Dispenser for supplying pieces of paper from a paper stripwith transversal pre-cut lines, characterised in that it includes:abox-shaped housing (3) with a recess (4) for receiving a reel (2) ofpaper; a first pulling-out mechanism (6) supported by said box-shapedhousing (3) and including a first pair of horizontal rollers (61, 62),upper and lower respectively, connected to each other by a plurality ofbelts (63) which run into respective first and second grooves (61a, 62a)made in said upper and lower rollers (61, 62), said first grooves havingtheir innermost diameter bigger than an innermost diameter of saidsecond grooves; a cover (5) hinged to said box-shaped housing (3) forallowing, when opened, insertion of a reel (2) into said recess (4),said cover being adapted to assume one or the other of two positions,namely an inoperative closing position (R) and an operative closingposition (O); a second pulling mechanism (9) supported by said cover (5)and including a second pair of horizontal rollers (91, 92) upper andlower respectively, connected to each other by a plurality of belts (93)which run into respective first and second grooves (91a, 92a), with saidfirst grooves (91a) having their innermost diameter bigger than theinnermost diameter of said second grooves (92a), with a run of each oneof these last mentioned belts (93) facing a corresponding run of arespective belt (63) of said first pulling-out mechanism (6); powerdriving means (7), activated by control means and provided for operatingsaid pulling-out mechanisms (6,9) in a first situation corresponding tosaid closing and operative position (O) of the cover, in which the upperrollers (61,91) are almost in contact which each other, whereas thelower rollers (62,92) are separated from each other to define acondition in which a piece of paper is unrolled from the reel (2) andmade pass through said upper rollers (61,91), said facing runs of thebelts (63,93), and said lower rollers (62,92) then going out of saiddispenser (1) downstream of said lower rollers (62,92), as well as in asecond situation corresponding to said inoperative position (R) of thecover, in which said upper rollers (61,91) and respectively said lowerrollers (62,92) are almost in contact with each other to define acondition in which said piece of paper is separated from said stripalong one of said pre-cut lines located between said upper rollers(61,91) and lower rollers (62,92) as a consequence of pulling action dueto higher speed of said lower rollers (62,92) with respect to said upperrollers (61,91).
 2. Dispenser, according to claim 1, characterised inthat the said control means include:push button means (70); a rockinglever (51), supported by the cover (5), that acts on said push buttonmeans in said first situation as a consequence of the cover passage fromthe inoperative position (R) to the operative position (O), and in saidsecond situation because a piece of paper is pulled out of thedispenser.
 3. Dispenser, according to claim 1, characterised in thatsaid control means include:push button means (70); a rocking lever (51),supported by the cover (5) and acting on said push button means in saidfirst situation as a consequence of the cover passage from theinoperative position (R) to the operative position (O); a timer, resetafter the first situation has been completed, simultaneously with thecover return to the inoperative position (R), for activating said powerdriving means (7) for a period of time corresponding to duration of saidsecond situation.
 4. Dispenser, according to claim 1, characterised inthat said upper rollers (91,62) and lower rollers (92,62) and thefulcrum (F) between the cover (5) and the housing (3) are mutuallypositioned in such a manner that, during closing of said cover, theupper roller (91) and the lower roller (92) of the second pulling-outmechanism (9) overlap and press the upper roller (61) and the lowerroller (62) of the first pulling-out mechanism (6) respectively, inorder to take a stationary locking position, defining said closinginoperative position (R) of the same cover (5).
 5. Dispenser forsupplying pieces of paper from a paper strip, characterised in that itincludes:a box-shaped housing (3) with a recess (4) for receiving a reel(2) of paper; a first pulling-out mechanism (6) supported by saidbox-shaped housing (3) and including a first pair of horizontal rollers(61,62), upper and lower respectively, connected to each other by aplurality of belts (63) which run into respective first and secondgrooves (61a, 62a) made in said upper and lower rollers (61,62), saidfirst grooves having their innermost diameter bigger than an innermostdiameter of said second grooves; a switch, subjected to related elasticmeans (32), placed between facing runs of said belts (63) and set inengagement therewith; a cover (5) hinged to said box-shaped housing (3)for allowing, when opened, insertion of a reel (2) into said recess (4),said cover being adapted to assume one or the other of two positions,namely an inoperative closing position (R) and an operative closingposition (O); a second pulling mechanism (9) supported by said cover (5)and including a second pair of horizontal rollers (91,92) upper andlower respectively, connected to each other by a plurality of belts (93)which run into respective first and second grooves (91a, 92a), saidfirst grooves (91a) having their innermost diameter bigger than aninnermost diameter of said second grooves (92a), with a run of each oneof these last mentioned belts (93) facing a corresponding run of arespective belt (63) of the first pulling-out mechanism (6) and pressedthereonto, at least in the region of the upper part of said facing runs,by reaction of elastic means (32), connected with said switch, and byelastic reaction of said belts (93) of said second mechanism (9); astationary blade (30) located in a position intermediate between saidupper rollers (61,91) and lower rollers (62,92); power driving means(7), activated by control means and provided for operating saidpulling-out mechanisms (6,9) in a first situation corresponding to saidclosing operative position (O) of the cover, in which the upper rollers(61,91) are almost in contact with each other, whereas the lower rollers(62,92) are separated from each other to define a first condition inwhich a piece of paper is unrolled from the reel (2) and made passthrough said upper rollers (61,91), said facing runs of said beltsfollowing a path that does not interfere with said blade, and finallybetween said lower rollers (62,92) then going out of the dispenser (1)downstream of said lower rollers (62,92), as well as in a secondsituation, corresponding to said inoperative position (R) of the cover,in which said upper rollers (61,91) and lower rollers (62,92)respectively are almost in contact with each other in order to define asecond condition, in which a pulling action provoked by higher speed ofsaid lower rollers (62,92) with respect to said upper rollers (61,91)tightens the piece of paper situated between said lower and upperrollers, and passing between said facing runs, thus changing thearrangement of said facing runs, against elastic reaction of saidelastic means (32) connected to said switch, so that said piece of paperis cut by the stationary blade (30) and separated from said strip ofpaper.
 6. Dispenser, according to claim 5, characterised in that saidswitch (31) includes a fork (31), that swings with respect to a fulcrumcoaxial with rotation axis of the upper roller (61) of the firstpulling-out mechanism (6), and that is equipped with rollers (33)supported idle on the ends of related prongs and engaged with said belts(63), with said fork (31) subjected to the action of said, elastic means(32).
 7. Dispenser, according to claim 5, characterised in that itincludes a tightener acting on said belts of said pulling-out mechanism(9), said tightener including a pair of rollers (41), engaged with thebelts (93) and rotatably supported by bars (42) which are insertedtelescopically in opposite extremities of a sleeve (43), against theaction of elastic means (44).
 8. Dispenser, according to claim 5,characterised in that the said control means include:push button means(70); a rocking lever (51), supported by the cover (5), that acts onsaid push button means in said first situation as a consequence of thecover passage from the inoperative position (R) to the operativeposition (O), and in said second situation because a piece of paper ispulled out of the dispenser.
 9. Dispenser, according to claim 5,characterised in that said control means include:push button means (70);a rocking lever (51), supported by the cover (5), and acting on saidpush button means in said first situation as a consequence of the coverpassage from the inoperative position (R) to the operative position (O);a timer, reset after the first situation has been completed,simultaneously with the cover return to the inoperative position (R),for activating said power driving means (7) for a period of timecorresponding to duration of said second situation.
 10. Dispenser,according to claim 5, characterised in that said upper rollers (91,62)and lower rollers (92,62) ans the fulcrum (F) between the cover (5) andthe housing (3) are mutually positioned in such a manner that, duringclosing of said cover, the upper roller (91) and the lower roller (92)of the second pulling-out mechanism (9) overlap and press the upperroller (61) and the lower roller (62) of the first pulling-out mechanism(6) respectively, in order to take a stationary locking position,defining said closing inoperative position (R) of the same cover (5).11. Dispenser for supplying pieces of paper from a paper strip,characterised in that it includes:a box-shaped housing (3) with a recess(4) for receiving a reel (2) of paper; a first pulling-out mechanism (6)supported by said box-shaped housing (3) and including a first pair ofhorizontal rollers (61,62), upper and lower respectively, connected toeach other by a plurality of belts (63) which run into respective firstand second grooves (61a, 62a) made in said upper and lower rollers(61,62), said first grooves having their innermost diameter bigger thanan innermost diameter of said second grooves; a cover (5) hinged to saidbox-shaped housing (3) for allowing, when opened, insertion of a reel(2) into said recess (4), said cover being adapted to assume one oranother of three positions, namely an inoperative closing position (R),an operative closing position (O) and a cutting position (T); a secondpulling mechanism (9) supported by said cover (5) and including a secondpair of horizontal rollers (91,92) upper and lower respectively,connected to each other by a plurality of belts (93) which run intorespective first and second grooves (91a, 92a), said first grooves (91a)having their innermost diameter bigger than an innermost diameter ofsaid second grooves (92a), with a run of each one of these lastmentioned belts (93) facing a corresponding run of a respective belt(63) of the first pulling-out mechanism (6); a pinion (64) keyed onto anhead of said upper roller (61) of said first pulling-out mechanism (6)and provided for being set in mesh engagement with a toothed sector (81)made along the outline of a disc (80) rotatably supported by the housing(3); two auxiliary rollers (95) rotatably supported by opposite ends ofsaid upper roller (91) of said second pulling-out mechanism (9) andpressed onto sloping surfaces (96a), formed on extensions (96) madeintegral with said housing (3), by the elastic reaction of the belts(93); an annular cam groove (82) including an in/out region (82c) andtwo adjacent portions (82a, 82b), namely a first portion (82a) withconstant radius and a second portion (82b) with varying radius; a pin(50) rotatably supported by said cover (5) and running along said camgroove (82); a blade (30) formed by adjacent sectors and supported bysaid housing (3) in a region intermediate between said upper rollers(61,91) and lower rollers (62,92); a paper pressing member (35)supported by said cover (5) in a position in which it faces said blade(30); power driving means (7), activated by control means and providedfor one turn rotation of said disc (80) in a predetermined direction (W)so as to determine:a first situation, in which the cover (5) takes saidclosing and operative position (O), in which the paper unrolls from saidreel (2) and passes through said upper rollers (61,91), which areseparated from each other, said counter-facing runs of said belts(63,93), said lower rollers (62,92) which touch each other, finallygoing out of said dispenser (1) downstream of said lower rollers(62,92); a second situation, in which the cover (5) takes said cuttingposition (T), in which the paper unrolling stops and the paper locatedbetween said pulling-out mechanisms (6,9) is pushed by said paperpressing element (35) against said blade (30), so that a series of cuts(2a) are made in the paper; a third situation, in which said cover (5)takes said inoperative position (R), in which said pulling-outmechanisms (6,9), with said upper rollers (61,91) and lower rollers(62,92) respectively touching each other, are operated to tear a pieceof paper from said strip along said cuts (2a) as a consequence of apulling action provoked by higher speed of said lower rollers (62,92)with respect to said upper rollers (61,91).
 12. Dispenser, according toclaim 11, characterised in that said second portion (82b) of said camgroove (82) includes a first section with decreasing radius and a secondsection with increasing radius, so that:in said first situation said pin(50) runs said first portion (82a) of said cam groove (82) starting fromsaid in/out region (82c) while said toothed sector (81) is in meshengagement with said pinion (64), for operation of said pulling-outmechanisms (6,9), and said auxiliary rollers are in abutment onto saidsloping surfaces (96a) to raise said upper roller (91) connected theretoand move it apart from the adjacent upper roller, (61), thus allowingthe paper to slip between said upper rollers (61,91); in said secondsituation said pin (50) runs said first section of said second portion(82b), while said toothed sector (81) is disengaged from said pinion(64) and the cover (5) moves to said cutting position (T) in which thepaper is pushed by the paper presser member (35) against the blade (30)while said pulling-out mechanisms (6,9) are stopped; in said thirdsituation said pin (50) runs said second section of said second portion(82b), while said toothed sector (81) is kept in mesh with said pinion(64) thus moving said cover to said inoperative position (R) andoperating said pulling-out mechanisms (6,9).
 13. Dispenser, according toclaim 11, characterised in that the said control means include:pushbutton means (70); a rocking lever (51), supported by the cover (5),that acts on said push button means in said first situation as aconsequence of the cover passage from the inoperative position (R) tothe operative position (O), and in said second situation because a pieceof paper is pulled out of the dispenser.